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PIC is a family of microcontrollers made by Microchip Technology, derived from the PIC1650 originally developed by General Instrument's Microelectronics Division.

C sample code for PIC micros and Hi-Tech C. Sample projects for the Microchip PIC micro series of microcontrollers, including the PIC12x, PIC16x, PIC18x, PIC24x, and.

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EPanorama – Software and tools section. The Hardware Book v1.3 The Hardware Book contains miscellaneous technical information about computers and other electronic. Pinout ed equivalenze Transistor bjt di bassa potenza. Scansione di una pagina di una vecchia rivista di elettronica (di cui purtroppo non ricordo il nome), che. This is a project that I’ve been planning on putting together for a long time. After creating an oscilloscope using a PIC12F675, I wanted to create a simple and. I’m trying to find a cheap programmer for this board. I’ve already built it, but I didn’t worry too much about programming it at first.

F2. 55. 0 and USB when I get it going I have an idea for a high frequency digital oscilloscope that I want to run by you guys. Let me know if you think its possible.

I’ve noticed a lot of homemade oscilloscopes that run at low frequencies, perhaps up to several MHz, and while these are impressive, they are not that practical for use beyond low frequency projects like audio. So here’s what I propose: Every physically realizable waveform can be represented by an infinite sum of simple sinusoids (Fourier theory).

Using a variable, electrically controlled capacitor (varicap?) we create a simple bandpass filter (i think thats the name anyway). The filter allows only certain frequencies through and attenuates or blocks the other frequencies. The varicap can be used to select the desired frequency that we want to test for. Again, the signal is tested to see if that particular frequency component is present.

If it is it passes through the filter and sets the pin to 1, 0 if it isnt present. The process repeats for a widerange offrequencies (say 1. The DC voltage can then be read by the ADC on the 2. With the DC voltage known we can mathematically determine what the amplitude of the input frequency was. Now all we would need is the phase information.

Im not sure how we would go about this though, although im sure its possible to do with passive components (we need to avoid opamps because of their low frequency response). Something to work out i guess hehe. Finally with this information collected the waveform is reconstructed from the spectrum (the amplitudes and phase of the frequency components present). As the number of frequencies tested increases the error in the waveform decreases. Sorry for the long and poorly worded explanation.

PIC1. 8 Pulse Width Modulation (PWM) DC Motor Speed Controller with the RPM Counter Project. Equipped with sophisticated Enhanced Capture/Compare/PWM (ECCP) peripheral the Microchip PIC1. F1. 4K5. 0 microcontroller could produce up to four PWM channels output. The enhanced PWM (Pulse Width Modulation) mode in ECCP peripheral is capable to drive the full bridge DC Motor circuit directly both in forward or reverse direction. It also could generate single PWM output on the selectable PIC1. F1. 4K5. 0 pins when it configured in pulse steering mode.

In this tutorial we will take advantage of PIC1. F1. 4K5. 0 pulse steering mode to drive the DC Motor and at the same time we will build the RPM (Rotation per Minute) counter to observe the PWM effect on the DC Motor speed and display it on the 2. This project also serves as the learning tools of how to use many of the Microchip PIC1. Lifeforce Movie Download read more. You could see the complete project demonstrated on the video at the end of this tutorial; Ok now let’s list down all the project interesting features: Using Advanced 8- bit Microchip PIC1. F1. 4K5. 0 microcontroller with PICJazz 2. PIN development board. Driving the HD4. 47.

U 2. The TIMER2 counter clock (TMR2) is supplied by selectable prescale clock, this prescale circuit will divide the system clock by 1, 4 or 1. The prescale could be selected by assigning the T2. CKPS1 and T2. CKPS0 bits in the T2. CON register. The TMR2 register value is continuously compared to the PR2 register which determine the TOP value of the TMR2 counter register. When the TMR2 register value reach the PR2 value, then the TMR2 counter register value will be reset to 0. At the same time the value of TMR2 counter register is also being compared to the CCPR1.

L register value (actually with the CCPR1. H register value, since the CCPR1. H equal to CCPR1. L than we could say CCPR1. L), when the TMR2 reach the CCPR1. L value than the PWM peripheral circuit will reset the CCP1 output (logical “0“) and when the TMR2 counter register equal to the PR2 register value than it will set the CCP1 output (logical “1“).

Therefore by changing the PR2 value we could change the PWM period and this mean changing the PWM frequency as well. The PWM period could be calculated using this following formula: PWM period = 4 x Tosc x ( PR2 + 1) x (TMR2 prescale value) second. Where Tosc is the system clock period in second. PWM frequency = 1 / PWM Period Hz. By assigning the PR2 register with 2.

ON) and set the prescale clock used by the TMR2 counter register. BY setting the T2. CKPS1=0 and T2. CKPS0=1 in the T2. CON register we select the 1: 4 prescale; and by setting the TMR2. ON to logical “1” we activate the TIMER2 peripheral. The following is the C code to initialize the TIMER2 peripheral: // PWM Period = 4 x Tosc x (PR2 + 1) x TMR2 Prescale Value. Tosc = 1/1. 6 Mhz = 0.

By setting P1. M1=0 and P1. M0=0 bits in the CCP1. CON register we select the single output PWM; setting the CCP1. M3=1, CCP1. M2=1, CCP1. M1=0 and CCP1. M0=0 in the CCP1. CON register we select the PWM mode with P1.

A, P1. C active- high; P1. B, P1. D active- high. On this tutorial we just set the additional 2 LSB extended bits (DC1. B1 and DC1. B0) to all zero (logical “0“) for the CCPR1.

In single PWM mode we could select the PWM output to PIC1. F1. 4K5. 0 RC3 output port by setting the STRC bit on PSTRCON (Pulse Steer Control) register to the logical “1” while other bits is set to logical “0“. The following is the C code: // Init PWM for Single Output. CCP1. CON=0b. 00. Single PWM mode; P1.

Microchip’s 1. 6- bit PIC2. F is cheaper, faster, and easier to work with, but largely absent from hacks and projects. We recently used a Microchip PIC2. F microcontroller in a mini web server project, but didn’t find many introductory references to link to. In this article we’ll cover some PIC 2. F basics: support circuitry and programming options. We’ll also talk about our favorite features, and how we figured them out.

Our next article will outline a web server on a business card based on the PIC 2. F. The basic circuit. This is the basic support circuit (full size . PIC 2. 4FJ6. 4GA0.

Some helpful documents are the code examples, application notes, individual datasheets, and 2. F family manual. Main system power supply. Peripherals and pins on the 2. F PICs operate between 2. This is a big advantage over older PICs because the 2. F can directly interface modern 3. SD memory cards. Some 1.

F and 1. 8F PICs will run at 3. As always, put a 0. F capacitor between each power pin and ground to decouple the chip from the power supply (C1, C2). Core power supply. The processor core requires a separate 2.

A built- in 2. 5volt regulator can be enabled by connecting the DISVREG pin to ground, and placing a 1. F capacitor between the Vcap/VDDCORE pin and ground (C3).

We’ve not experienced any problems using a 1. F low ESR electrolytic capacitor, but in the future we’ll use a tantalum capacitor as specified in the datasheet. Speed and crystal.

PIC 2. 4Fs have a max clock speed of 3. MHz, and complete one operation every 2 clock cycles for a top speed of 1. MIPS). Most 2. 4Fs have an internal 8. MHz oscillator, but you can also use an external crystal for a more precise timebase. An internal phase lock loop (PLL) can multiply any clock signal by four. We used a common option: 8.

MHz internal oscillator multiplied by four (3. MHz), with full IO functions on the external oscillator pins. The clock mode is set with CONFIG2. Use these settings to run a PIC 2. F at 3. 2MHz using the internal oscillator and PLL. Internal FRC OSC with 4x PLL @ 3.

MHz. //from p. 24. FJ6. 4GA0. 02. h. FNOSC. ICSP consists of a clock line (PGC), bi- directional data line (PGD), master clear and reset (MCLR), and connections to power (V+) and ground (GND). The MCLR function resets the chip when voltage levels are too low to operate. Enable it with a 2. K) ohm resistor (R1. MCLR pin. Optionally, add a button (S1) from MCLR to ground for a manual reset switch.

The programmer also connects to the MCLR pin to reset the PIC and control programming modes. PIC 2. 4Fs have several sets of programming pins labeled PGDx and PGCx. Choose the set most convenient for your design. One catch: you can’t use the clock pin of one set and the data pin of another, you have to use the same pair.

The primary pin pair used for debugging is programmed in CONFIG1 with the ICS. This only effects debugging; programming is still possible from any pin pair. These are usually 5volt programmers that place 1.

The ICD2 is Microchip’s cheapest programmer for the full 2. F line. An education discount is available if you have a .

There are numerous clones too, most notable is the Olimex PIC- ICD2 clone, also sold by Sparkfun. We’ve never used it, but it’s supposed to be an exact clone. You can also try your hand at building a DIY ICD2 clone, we’ve had luck with the Pi. CS Rev B in the past. You’ll probably need to build an adapter to use a homebrew ICD2 with a PIC 2. F. MPLAB is a free development environment for coding, compiling, and debugging all PIC microcontrollers.

We like to program in C, so we downloaded the free, evaluation/student edition of the Microchip C3. MPLAB. HI- TECH’s C compiler is a fairly popular alternative if you’re not thrilled about MPLAB. Microchip’s low- voltage 1.

Fxx. J line, such as the Ethernet enabled 1. F9. 7J6. 0, can only be programmed a few hundred times. That’s fine for production, but really unfriendly to a developer. We’re exceedingly happy to note that the 2. F can be programmed at least 1. New features and improvements.

We made a list of the things we liked best about the PIC 2. F after using it in a project.